Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e23442beb3e8ca…

MALICIOUS

PDF

46.7 KB Created: 2020-07-30 09:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e0d2ee3f89b0a6b7a5a9580a531269e SHA-1: 544bc63dbcebd786b20146aec196cd0a0abab0d3 SHA-256: 01e23442beb3e8ca498c783e95a8c5b59a1a630a5a3c79481958b5b0013a61c5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, appears to be a lure for downloading a PDF, likely to trick users into visiting these malicious links. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=veterinary+microbiology+and+microbial+disease+2nd+edition+pdf+free+download
    • http://files.shelterreform.org/uploads/1/3/1/3/131398432/kezamoxamawo-fegatopijejanob-zekuxaminupom.pdf
    • http://files.graceofcalvary.org/uploads/1/3/0/7/130776230/napirun_wukogi_rilek.pdf
    • http://files.saujs.co.za/uploads/1/3/2/6/132681824/8694376.pdf
    • http://files.dwharris.net/uploads/1/3/1/4/131406234/24d02688f2f0dd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/zimudaxesini.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4784/files/32542257482.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/36779716320.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/towiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/zasikid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/zisewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/karuzuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/86028121810.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/56466318791.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/48397299342.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077a7.bin
2dfc6c5410200b0cfb034321c6bb4b15764724f68b8e7449267a0e5344cc1d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A7 5696 bytes
font_01_sfnt_off00008aff.bin
a5a81ac7236ec7955c41962b2da1b4c504b5851bd7a070de7ce893f143d5973d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFF 9852 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.